Sitting chatting in a small group my DH will often cut across the person who is talking and start up a different conversation with the person he is sat next to, or start showing them videos on his phone.
I think this is incredibly rude and embarrassing as it appears that he thinks he's got a more interesting topic to talk about and those of us who were trying to listen to the original conversation now have to compete with his loud voice discussing something else.
I feel like telling him to shut up at the time but I know he will be furious and think I'm belittling him. By the time we get home I'm loathed to bring it up and cause an argument as I know he won't agree that he is being rude.
How would you handle this?